US2683863A - Resonant window and method of making same - Google Patents

Resonant window and method of making same Download PDF

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Publication number
US2683863A
US2683863A US218840A US21884051A US2683863A US 2683863 A US2683863 A US 2683863A US 218840 A US218840 A US 218840A US 21884051 A US21884051 A US 21884051A US 2683863 A US2683863 A US 2683863A
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US
United States
Prior art keywords
window
resonant
opening
coating
making same
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US218840A
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English (en)
Inventor
Truman P Curtis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US218840A priority Critical patent/US2683863A/en
Priority to GB8394/52A priority patent/GB706819A/en
Priority to FR63456D priority patent/FR63456E/fr
Application granted granted Critical
Publication of US2683863A publication Critical patent/US2683863A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/08—Dielectric windows

Definitions

  • My invention relates to an improved resonant window structure and an improved method of making such structures.
  • a wall section which is vacuum-tight made up of a dielectric plate such as glass or ceramic, having a surface area framed by a conducting member, dimensioned to provide a resonant opening or window.
  • Windows of this general character have been used in wave guides, such as the output wave guide of an electric discharge device, in order to provide for the transmission of energy from the device and, at the same time, complete the wall of the vacuum-tight envelope. These windows have also been used in high frequency gaps known in the art as transmit-receive and anti-transmit receive devices, for use in connection with transmitting and receiving apparatus coupled to a Single antenna.
  • FIG. 1 is a perspective view of a Wave guide terminating in a window embodying the present invention
  • Fig. 2 is a sectional View taken along the line 2-2 of Fig. 1
  • Fig. 3 is an elevational view of the dielectric window metallized in accordance with the present invention prior to assembly in the wave guide.
  • the window includes a metallic frame 3 having a rectangular opening 4 in the end thereof and an outwardly extending flange 5 at the opposite end for joining with a corresponding flange 6 formed on the wave guide.
  • the resonant opening or window I is defined by a metallized coating 8 on the surface of a dielectric plate 9 which is joined to and supported from the frame 3.
  • a generally rectangular dielectric plate 9, as shown in Fig. 3, is preferably provided with a beveled edge l0 and is provided with a tightly adhering metal coating H on the marginal area of one face thereof and also on the outer edge, if desired.
  • This coating may be applied in accordance with any of the known processes for metallizing the material of the window. If the window is of ceramic, the metallizing may be done to advantage by the manganese method, which is described in detail in the copending application Serial No. 722,049 filed January 14, 1947, and as signed to the assignee of this invention.
  • a mixture of manganese and a powder selected from the group consisting of molybdenum, iron, tungsten, and nickel, but preferably consisting of molybdenum, is mixed with a quantity of elemental manganese and painted or sprayed on the surface to be metallized. It is apparent that by use of a suitable template that the area to be covered by the metallized coating is readily controlled so that the dimensions of the window opening I are subject to accurate determination during the manufacturing operation.
  • the resultant plate after the coating has been applied, is heated in a hydrogen atmosphere to a temperature in the order of 1400" C. for a period of 5 to 15 minutes, to provide the tightly adhering coating.
  • the finished product is then in suitable condition for brazing by a silver brazing process, for example, to the inwardly directed flange of the frame 3.
  • the manganese-molybdenum method of metallizing described above it is also possible to use the titanium hydride method de scribed and claimed in copending application Serial No. 36,244Bondley, filed June 30, 1948, and assigned to the assignee of this invention.
  • the area to be metallized is painted with powdered titanium hydride in a suitable carrier or binder, and the parts assembled in the final position.
  • a body of solder is placed in position to melt and fiow into contact with the coated area when it is melted.
  • This assembly is heated in a vacuum to a temperature suificient to dissociate the hydride and melt the solder, so that the metallizing and bonding of the dielectric plate into the frame may be accomplished in one operation.
  • my invention provides an improved structure for windows of the resonant type, which is readily manufactured and which provides for the attainment of the desired operating frequency of the device by simply grinding off a small amount of the metallized coating.
  • a resonant window for high frequency apparatus comprising a window member of dielectric material, a metallic coating on one face of said window member defining a resonant opening, a metal frame joined to said member and having an opening registering with and substantially larger than the opening defined by said metallic coating.
  • the method of making a resonant window of high frequency electrical apparatus which comprises the steps of applying a tightly adhering metal coating to a marginal area of one face of a plate of dielectric material to define a resonant opening, joining a metal supporting frame to a part of the coated area and leaving an area of the coating surrounding the resonant opening exposed so that the resonant frequency of the window is determined by the area of the opening in the metallized coating and removing metal from the edges of the opening in the metal coating to determine the resonant frequency of the window.
  • a resonant window for high frequency electrical apparatus comprising, a window member of dielectric material, a tightly adhering metal coating on the marginal area of one face of said window member defining a resonant opening, a metal supporting frame joined to a part of the coated area and having an opening registering with and substantially larger than the opening defined by said metal coating.

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  • Ceramic Products (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
US218840A 1951-04-02 1951-04-02 Resonant window and method of making same Expired - Lifetime US2683863A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US218840A US2683863A (en) 1951-04-02 1951-04-02 Resonant window and method of making same
GB8394/52A GB706819A (en) 1951-04-02 1952-04-02 Improvements in and relating to resonant windows in waveguide apparatus
FR63456D FR63456E (fr) 1951-04-02 1952-04-02 Perfectionnement aux guides d'ondes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US218840A US2683863A (en) 1951-04-02 1951-04-02 Resonant window and method of making same

Publications (1)

Publication Number Publication Date
US2683863A true US2683863A (en) 1954-07-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US218840A Expired - Lifetime US2683863A (en) 1951-04-02 1951-04-02 Resonant window and method of making same

Country Status (3)

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US (1) US2683863A (fr)
FR (1) FR63456E (fr)
GB (1) GB706819A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770784A (en) * 1952-06-25 1956-11-13 Robert H Hatch Metal painted aperture or window for waveguides
US3101461A (en) * 1959-01-05 1963-08-20 Cie De Telegraphie Sans Fil Vacuum tight waveguide transmission window having means guarding window edges from electric stress
US3101460A (en) * 1957-05-07 1963-08-20 Microwave Ass Hermetically sealed waveguide window with non-sputtering iris
US3324427A (en) * 1964-05-06 1967-06-06 Varian Associates Electromagnetic wave permeable window
US3828284A (en) * 1973-03-01 1974-08-06 T Hutchins Microwave device including indium-joined quartz window closing off hermetic chamber
ITRM20090599A1 (it) * 2009-11-19 2011-05-20 V L T Vacuum Lasers Technology S R L "giunzione vetro-metallo per saldobrasatura sotto vuoto di un componente per tubi ricevitori per impianti di tipo solare termodinamico, e metodo per la sua realizzazione"

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1160700B (it) * 1977-10-25 1987-03-11 Bfg Glassgroup Pannelli

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151686A (en) * 1935-06-08 1939-03-28 Caesar J Briefer Electric lamp and process of making the same
US2467730A (en) * 1943-11-10 1949-04-19 Westinghouse Electric Corp Vacuum seal for wave guides
US2523155A (en) * 1944-05-24 1950-09-19 Westinghouse Electric Corp Glass-to-metal sealing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151686A (en) * 1935-06-08 1939-03-28 Caesar J Briefer Electric lamp and process of making the same
US2467730A (en) * 1943-11-10 1949-04-19 Westinghouse Electric Corp Vacuum seal for wave guides
US2523155A (en) * 1944-05-24 1950-09-19 Westinghouse Electric Corp Glass-to-metal sealing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770784A (en) * 1952-06-25 1956-11-13 Robert H Hatch Metal painted aperture or window for waveguides
US3101460A (en) * 1957-05-07 1963-08-20 Microwave Ass Hermetically sealed waveguide window with non-sputtering iris
US3101461A (en) * 1959-01-05 1963-08-20 Cie De Telegraphie Sans Fil Vacuum tight waveguide transmission window having means guarding window edges from electric stress
US3324427A (en) * 1964-05-06 1967-06-06 Varian Associates Electromagnetic wave permeable window
US3828284A (en) * 1973-03-01 1974-08-06 T Hutchins Microwave device including indium-joined quartz window closing off hermetic chamber
ITRM20090599A1 (it) * 2009-11-19 2011-05-20 V L T Vacuum Lasers Technology S R L "giunzione vetro-metallo per saldobrasatura sotto vuoto di un componente per tubi ricevitori per impianti di tipo solare termodinamico, e metodo per la sua realizzazione"

Also Published As

Publication number Publication date
FR63456E (fr) 1955-09-28
GB706819A (en) 1954-04-07

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